Microsoft’s Entra ID Security Blunder: A Comedy of Errors or a Cyber Nightmare?
A critical token validation flaw in Microsoft Entra ID (formerly Azure Active Directory) could have let attackers impersonate any user, including Global Administrators. With a CVSS score of 10.0, this vulnerability was no laughing matter, but thankfully it was patched before any nefarious actors could create chaos.
Hot Take:
Looks like Microsoft’s Azure Entra ID threw a party and forgot to invite the bouncers! With a CVSS score of 10.0, this security flaw is the equivalent of leaving your front door open with a “Please Rob Me” sign. Thankfully, Microsoft has patched it up before any cyber criminals decided to RSVP.
Key Points:
- A critical flaw allowed attackers to impersonate users, including Global Admins, across tenants.
- The vulnerability, CVE-2025-55241, scored a perfect 10 on the CVSS scale.
- No evidence of real-world exploitation; Microsoft patched the flaw by July 17, 2025.
- The issue involved a faulty validation process in the legacy Azure AD Graph API.
- Microsoft has deprecated Azure AD Graph API, urging migration to Microsoft Graph.
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